Hydraulic press



April 22, 1930. I R. E. MANLEY 1,755,403

HYDRAULIC PRESS Filed Jan 5, 1926 5 Sheets-Sheet 2 ambanto a.

Mei! 331d R. E, MANLEY April 22, 1930.

HYDRAULIC PRESS- wed Jan 5, 1926 :5 Sheets-Sheet s anvemfo'ar PatentedApr. 22, 1930 UNITED STATES PATENT OFFICE ROBERT E. MANLEY, OF YORK,PENNSYIJVANIA, ASSIGNOR TO MIANLEY MANUFAC- TURING COMPANY, OF YORK,PENNSYLVANIA; A CORPORATION OF DELAWARE HYDRAULIC PRESS Application medJanuary 5, 1926. Serial No. 79,434.

This invention relates to presses and has for its principal object theprovision of an efficient hydraulic press suited for garage use.

A further object of the present invention lies in the provision of ahydraulic press which can rapidly be positioned and which may beoperated at either high or low speed.

A still further object of the present invention is the provision ofmeans for avoiding leakage of oil from the press to the work.

In the drawings Figure 1 is an elevation of a hydraulic press embodyingthe present invention. I

Figure 2 is a cross section thru the ram and pump cylinders.

Figure 3 is a vertical section thru the two flanges of the pump.

Figure 4 is a top plan view of the pump mechanism.

Figure 5 is a side elevation showing a pump lever with its link andassociated mechanism.

The press stand is preferably of usual type constructed from commercialmetal sections as for example, the two channel feet 10 to each of whichis secured a pair of vertical angle uprights 11 connected midway oftheir length by the heavy channels 14 which under certain circumstancesform a bed. At the top of the uprights 11 are the two channels 16 boltedto the uprights 11 as at 17 and having their side flanges parallel andhorizontal forming the usual body of the press' To these members 16ofthe main bed or table are secured the uprights 20 carrying at theirtop two opposed channel members 22 forming the support for the ramcylinder 30 which preferably has heavy integral lugs 31 bolted to thelower flange of the beams 22.

To one side of the uprights 20 and supported from the channels 22 is anoil tank 36 in which are two pump cylinders 40 and 41, the latter havinga considerably larger bore and plunger than the pump 40. Individualflythese pumpsare old and well known and I claim only their arrangement inthe tank 35 and their twin arrangement to dischargeindividually orcollectively to the 'ram. I

' mount between the two cylinders a check body 43 having a springpressed'ball valve 44 pipe 54 is in, can be used alone.

The valve body 44 communicates with a pipe 56 leading to the top of theram cylinder 30 and a pipe 58 leads from the pipe 56 back to the tank,and it is controlled by a valve 60 which is opened to permit return offluid from the top of the ram to the reservoir or tank 35. The type ofeach'valve is unimpor-- tant but is preferably such as to openautomatically upon excessive pressure in the ram cylinder and to beopened manually to raise the ram.

In addition to the sturdy lugs 31 near the bottom of the ram cylinder 30I provide two smaller lugs 62 at the top of the cylinder, and in theselugs Imount threaded'hooks 64 to which are secured springs 65 secured toa yoke fast to the ram 71, so as -to cause the ram to receive thedischarged fluid back into the reservoir when the valve 60 has beenopened.

A very important feature of the present invention is the provision of ascrew threaded into the ram. This screw 73 naturally has square threadsand is splined to the hub 74 of a hand wheel 75 rotatably mounted onball bearings 76 between the annular flange 77 of the hub and a loosecollar 78 suspended from the yoke 70 by means of screws 79, the yoke 70being secured directly to the-ram as by the countersunk screws 80. Asthe parts are shown in Figure 2 the ram and a screw are each at theirhighest points giving maximum clearance between the bed or anvil andwhatever tool is secured to the screw 73. By turning the hand wheel 75the screw 73 may be lowered with respect to the ram in an extremelyrapid manner. and this will allow the ram to have its full travel ifdesired after the screw has been brought into contact with the work.

At the bottom of the ram I provide the usual stufling box 85 and abovethe packin 86 I form a groove 87 in the ram cylinder an I bore apassageway 88 thru the cylinder to a tapped hole recelving a nipple '89'oined by a union 90 to at small tube 91 .leadmg to the oil tank 35. Bymeans of this very important feature I remove all possibility of 'oilleaking past the packing 86 and getting on the work as communicationbetween the oil groove 87 and the reservoir is free and unrestricted. Nomatterhow carefully the cup washer 93 at the topof the ram be fittedthere is always leakage around the ram and the provision of the oove 87entirely eliminates the possibility c this escaping oil reaching Q thework.

The operation of the device is as follows The work is placed directly onthe bed formed either by the channels 14 or 16 or uponan anvil of anyform (not shown) placed on lonej' or the other of these beds and thehand wheel is rotated to bring the tool carried b the screw 73 intocontact with the work. f the distance between the work and the'tool-isnot too great the movement of the hand wheel will be all thatisnecessary; if not the screw.

can be lowered to its-safe limit and then the ram is lowered the rest ofthe way by. placing the handle 54 in the socket of one of the pumps forexample, the socket 48 and conling together the two pumps to give a veryarge volume of oil. Assuming that the pressure r uired' will be heavythe pin 52 is now remove and the smaller pump is used alone.

In case the work' was not quite so heavy the handle 54 would have beenput in the other which time the two springs upward carrying with it thewheel, colsocket so that, when contact was made,- the required bendingor pressing could be the more quickly accomplished. It should beunderstood the pin 52 is entirely optional and the larger pump may bemade of such size as to pump suflicient quantity for any use that mightbe expected. When the pressing has 3. In a press, a ram cylinder a ram,means for telescoping the ram into the cylinder, a screw in said ram,and means carried by said telescoping means for causing relativemovement between the screw and the ram.

4. In combination, aram cylinder, a ram,-

a screw threaded into said ram, a yoke secured to said ram, means forcauslng said yoke .to telescope the ram into its cylinder, a collarcarried by said yoke, a hand wheel rotatably mounted in said collar, andno'n-rotatably secured tosaid screw.

5. In a garage press, a vertically positioned ram cylinder in which thepressure fluid is admitted at the top of the cylinder above the ram, aram slidable in the cylinder, a pressing screw carried by the ramadapted toengage work beneath the ram, manually operated means below theram for moving the screw longitudinally of the ram for quick adjustmentwith respect to the work, and means bc-' low the pressure head of theram and near the lowerend of the cylinder for collecting. the liquidwhichleaks downwardly past the pressure head of the ram and fordischarging such liquid to one side of the cylinder so as to avoid thesoiling of the work and of the manually operated means b such leakage.

In testimony whereof I a x my signature.

ROBERT E. MANLEY.

been completed the valve 60, preferably pr'ovided with a handle as shownis opened at draw theyoke coaxial with said ram, a yokesecured to saidram,'and mean's carried by said yoke for causmg relative movementbetween the ram and

